WASP-8b: a retrograde transiting planet in a multiple system

Details WASP-8b: a retrograde transiting planet in a multiple system WASP-8b: a retrograde transiting planet in a multiple system

2010-06-26

arxiv.org/abs/1006.5089v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

A&A Letter Accepted (21/6/2010)

Scientific paper

We report the discovery of WASP-8, a transiting planet of 2.25+-0.08 M_Jup on a strongly inclined eccentric 8.15-day orbit, moving in a retrograde direction to the rotation of its late-G host star. Evidence is found that the star is in a multiple stellar system with two other companions. The dynamical complexity of the system indicates that it may have experienced secular interactions such as the Kozai mechanism or a formation that differs from the ``classical" disc-migration theory.

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